<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
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    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      // 原生 switch 的使用
      const num = 3;
      switch (num) {
        case 1:
          console.log(1);
          break;

        case 2:
          console.log(2);
          break;

        default:
          console.log(3);
          break;
      }
    </script>
  </body>
</html>
